乙二醇双子琥珀酸2-甲基戊基双酯磺酸钠的合成与性能研究

Synthesis and Properties of Ethylene glycol gemini Sodium 2-methyl-1-pentyl Sulfosuccinate

摘要:

采用单酯化反应、磺化反应和双酯化反应的合成顺序，以羰基固体酸作为酯化反应催化剂，中间体不需提纯分离等环境友好的合成工艺路线，在常压下合成了乙二醇双子琥珀酸（2-甲基戊基）双酯磺酸钠。对最佳合成工艺条件进行了具体研究。得到最佳工艺条件如下： n（顺酐）:n（2-甲基-1-戊醇）=1.05:1.00，占顺酐质量1%的烷基磺酸催化剂，于温度为80?C下单酯化反应1h,得到产率为98.88%的单酯化产物。n(顺酐):n(亚硫酸氢钠)=1.00:1.05，于70℃下磺化反应2.0h,得到产率为98.71%的磺化产物。n（顺酐）:n（乙二醇）=1.00:2.20，w(羰基固体酸)=3%，反应温度为180℃下双酯化反应3.5h，得到产率为85.03%的双酯化产物。测定了产物的表面表面张力为；30.3mN/mol；临界胶束浓度为；1.26?0-4 mol/L。

Abstract:

Ethylene glycol gemini sodium 2-methyl-1-pentyl sulfosuccinate was synthesized through an environmentally-friendly process, which was under normal pressure and in the order of single-esterification, sulfonation and diesterification, using carbonyl solid acid as the catalysis of esterification, without purification and separation to the intermediates. The optimum conditions were studied and concluded as follow, in the single-esterificatino, n(maletic anhydride):n(2-Methyl-1-pentanol)=1.05:1.00, using alkyl sulfonate which was 1% of the amount of maletic anhydride as the catalysis, at 80℃ for 1h, the yield can be 98.88%. For the sulfonation, n(maletic anhydride):n(sodium hydrogen sulfite)=1.00:1.05, at 70℃ for 2.0h, the yield can be 98.71%. In the diesterification, n(maletic anhydride):n(ethylene glycol)=1.00:2.20, w(carbonyl solid acid)=3%, at 180℃ for 3.5h, the yield can be 95.05%. The surface tension and critical micelle concentration of the product were tested as 30.3mN/mol and 1.26?0-4mol/L.